1 /*
   2  * Copyright (c) 2018, 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 #ifndef SHARE_OOPS_CPCACHE_INLINE_HPP
  26 #define SHARE_OOPS_CPCACHE_INLINE_HPP
  27 
  28 #include "oops/cpCache.hpp"
  29 #include "oops/oopHandle.inline.hpp"
  30 #include "runtime/orderAccess.hpp"
  31 
  32 inline int ConstantPoolCacheEntry::indices_ord() const { return Atomic::load_acquire(&_indices); }
  33 
  34 inline Bytecodes::Code ConstantPoolCacheEntry::bytecode_1() const {
  35   return Bytecodes::cast((indices_ord() >> bytecode_1_shift) & bytecode_1_mask);
  36 }
  37 
  38 inline Bytecodes::Code ConstantPoolCacheEntry::bytecode_2() const {
  39   return Bytecodes::cast((indices_ord() >> bytecode_2_shift) & bytecode_2_mask);
  40 }
  41 
  42 // Has this bytecode been resolved? Only valid for invokes and get/put field/static.
  43 inline bool ConstantPoolCacheEntry::is_resolved(Bytecodes::Code code) const {
  44   switch (bytecode_number(code)) {
  45     case 1:  return (bytecode_1() == code);
  46     case 2:  return (bytecode_2() == code);
  47   }
  48   return false;      // default: not resolved
  49 }
  50 
  51 inline Method* ConstantPoolCacheEntry::f2_as_interface_method() const {
  52   assert(bytecode_1() == Bytecodes::_invokeinterface, "");
  53   return (Method*)_f2;
  54 }
  55 
  56 inline Metadata* ConstantPoolCacheEntry::f1_ord() const { return (Metadata *)Atomic::load_acquire(&_f1); }
  57 
  58 inline Method* ConstantPoolCacheEntry::f1_as_method() const {
  59   Metadata* f1 = f1_ord(); assert(f1 == NULL || f1->is_method(), "");
  60   return (Method*)f1;
  61 }
  62 
  63 inline Klass* ConstantPoolCacheEntry::f1_as_klass() const {
  64   Metadata* f1 = f1_ord(); assert(f1 == NULL || f1->is_klass(), "");
  65   return (Klass*)f1;
  66 }
  67 
  68 inline bool ConstantPoolCacheEntry::is_f1_null() const { Metadata* f1 = f1_ord(); return f1 == NULL; }
  69 
  70 inline bool ConstantPoolCacheEntry::has_appendix() const {
  71   return (!is_f1_null()) && (_flags & (1 << has_appendix_shift)) != 0;
  72 }
  73 
  74 inline bool ConstantPoolCacheEntry::has_local_signature() const {
  75   return (!is_f1_null()) && (_flags & (1 << has_local_signature_shift)) != 0;
  76 }
  77 
  78 inline intx ConstantPoolCacheEntry::flags_ord() const   { return (intx)Atomic::load_acquire(&_flags); }
  79 
  80 inline bool ConstantPoolCacheEntry::indy_resolution_failed() const {
  81   intx flags = flags_ord();
  82   return (flags & (1 << indy_resolution_failed_shift)) != 0;
  83 }
  84 
  85 // Constructor
  86 inline ConstantPoolCache::ConstantPoolCache(int length,
  87                                             const intStack& inverse_index_map,
  88                                             const intStack& invokedynamic_inverse_index_map,
  89                                             const intStack& invokedynamic_references_map) :
  90                                                   _length(length),
  91                                                   _constant_pool(NULL) {
  92   CDS_JAVA_HEAP_ONLY(_archived_references = 0;)
  93   initialize(inverse_index_map, invokedynamic_inverse_index_map,
  94              invokedynamic_references_map);
  95   for (int i = 0; i < length; i++) {
  96     assert(entry_at(i)->is_f1_null(), "Failed to clear?");
  97   }
  98 }
  99 
 100 inline oop ConstantPoolCache::resolved_references() { return _resolved_references.resolve(); }
 101 
 102 #endif // SHARE_OOPS_CPCACHE_INLINE_HPP